STRUCTURED ANALYSIS (Software Engg.)

The contents are referenced from various sources and presented in easy way for better understanding.

1. STRUCTURED ANALYSIS Presented by - Bijoya Laishram

2. CONTENTS Introduction Characteristics Tools of Structured Analysis Goals

3. STRUCTURED ANALYSIS Fundamental aspect of system analysis. Set of techniques and graphical tools. Allow the analyst/system admin to develop a new kind of system specification. Easily understandable.

4. CHARACTERISTICS Graphical with supporting text. Allow system to be viewed in top-down and partitioned fashion. Minimum redundancies. Reader should be able to predict system behaviour. Easy to understand .

5. TOOLS OF STRUCTURED ANALYSIS 1. Data Flow Diagram (DFD) 2. Data Dictionary 3. Structured English 4. Decision Trees 5. Decision Table

6. 1.1- Data Flow Diagram (DFD) Graphical representation normally designed by a system analyst. It is used as a reference point by the progr- ammer which portrays the " flow“ of data through an information system.

7. - Input or output - Process - Directions - Data store 1.2- DFD’s SYMBOLS

8. 2. Data Dictionary It is a very important building base for DFD for maintaining a database. 3. Structured English It is the additional method which is used for overcoming the problems of the ambiguous language in stating the actions and conditions in making the decisions and formulating the procedures

9. 4. Decision Trees It represents conditions and actions sequentially and thus shows which conditions to consider first, which second and so on. 5. Decision Table It is a graphic method (in table) for descri- bing the logic of decisions.

10. GOALS Improve quality and reduce the risk of system failure. Establish concrete requirements specifications and complete requirements documentation. Focus on reliability, flexibility and maintain- ability of system

11. Thank you.